On 22/10/2010 12:13, Terry wrote:
> Hi one of customers who sends email out via our server using asmtp is having his email blocked by a barracuda system.
> But they are blocking it based on his address rather than our smtp server which is not black listed.
>
> 2010-10-22 09:58:17 1P9DR3-000I43-DY ** mhussain@??? F=<office@???> R=dnslookup T=remote_smtp: SMTP error from remote mail server after end of data: host smtpmail.ead.ae [195.229.40.150]: 554 Service unavailable; Client host [ns0.1stkmh.co.uk] blocked using Barracuda Reputation; http://www.barracudanetworks.com/reputation/?r=1&ip=86.170.248.224
> 2010-10-22 09:58:17 1P9DR3-000I43-DY Completed
>
> Must be a configuration error some where just not sure if it is the clients end our mail server or the Barracuda system
Does Barracuda recommend that their list is applied against received
headers, or against the connecting IP only? If the former, then it's
either they're blocking that mail on purpose because your client is
sending spam, or it's a false positive and Barracuda should be
contacted. If it's the latter, then the mail server you're connecting to
either has a broken configuration or a questionable policy regarding who
they use Barracudas blacklist.
I'd suggest contacting both Barracuda and the destination mail server
admin and asking them for delisting/whitelisting. If that's not
fruitful, one technical solution on your end would be to
remove/obfuscate the IP address of the client in the received headers.
GMail is one example of an email provider who removes the clients IP
address when sending email. I can't remember if they do that for both
SMTP and Webmail submitted messages, but they definitely do it for at
least one of them
--
Mike Cardwell - Perl/Java/Web developer, Linux admin, Email admin
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